Insulating and waterproofing composition for electrical



UNITED STATES PATENT OFFICE.

snonen 'rucxn'n, or LBBOCKTON, massncnusn'r'rs.

INSULATING AND WATERPROOFING COINIIOSIII'I'ION' FOR ELECTRICAL APPLIANCES.

1,311,301. No Drawing.

- as a coating for insulating and rendering waterproof the fieldmagnets of electrical motors, such as are used on electric railway. cars.

The object of my invention is to provide a preparation which may be used on the field magnets and armatures of motors so that water will not cause the burning out ofthe field or otherwise efiect the operation of the motor, and in-this connection to provide a preparation 1 which may be readily and cheaply formed and easily applied.

1 My preparation or compound for this purpose'consists of rosin and linseed oil, and in forming the com und, I mix thoroughly pinto boiled linseedoil. These-mgredients are thoroughly mixed, in a suitable vessel and then bo 1led,for an'hour and a half.

Of course the same roportionswill be used for larger or sma er quantities. The oil softens therosin andmakes' it elastic, and neither the heat of summer, nor the cold of. winterv has any efiect, as a consequence,

upon the coating applied to the field m nets, armatures, or other parts. If desir six pounds of re rosin with one Specification of Letters Patent. v Patented July 29, 1919.

Application filed June 1, 1918. Serial No. 237,754."

be dipped in'the hot solution as often asthe case requires. For instance, an electrical field may be'dipped in the hot solution and then as soon as possible it is taped with strong cotton tape It is again dipped in the hot solution, taped again and over this last layer of tape a final coating of shellac is applied. Having claim is: e

1. A composition for insulating and waterproofing electrical elements consisting described my invention, what I of a mixture of rosin and linseed oil.

2. A composition for insulating and waterproofing electrical elements consisting of a mixture of rosin and linseed oil in the proportions of six pounds of red rosin to one pint of linseed oil.

-In testimony whereof Ihereunto aflix my signature in the presence of two witnesses.

GEORGE TUCKER.

* Witnesses:

WILLIAM Fmsm, Arm'r H. Bmcxe'mrm. 

